about what he had done. >> reporter: fbi special agent jolie goeden interviewed keyes over a period of months, sitting in the same room with a man she now believes to be a real life monster. >> very meticulous. very organized. he definitely planned everything he did. >> reporter: keyes traveled the country from alaska to vermont, looking for people to kill, totally at random. and funding his crimes by robbing banks. the fbi has now retraced his steps. a long list of dates and locations since 2001, when they believe he may have killed repeatedly. they so far have eight confirmed murders and rapes, including a couple in essex, vermont, four in washington state and one more on the east coast with a body hidden in new york. and he told agents something they'd never heard before. that he left kill kits or caches, buried in several states, filled with everything he'd need to commit a murder. they were in waterproof containers and included guns and different things he could use to dispose of bodies. his strategy, to grab people in remote locations, like parks, campgrounds, even cemeteries.